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authorDavid Brownell <dbrownell@users.sourceforge.net>2008-08-06 21:55:14 -0700
committerDavid Woodhouse <David.Woodhouse@intel.com>2008-08-07 11:49:00 +0100
commit8c64038e4c077b2b37c6b27d0c40c77a3ddfaeef (patch)
treef7fbc1067724edd54de7b300b20028bd6203dc37 /drivers/mtd/devices/Kconfig
parentcf93ae02600e2c752bf2570085e7970a1c0f2b94 (diff)
downloadlinux-8c64038e4c077b2b37c6b27d0c40c77a3ddfaeef.tar.bz2
[MTD] make dataflash write-verify be optional
This adds a WRITE_VERIFY Kconfig option to the DataFlash driver, closely mirroring the similar NAND and ONENAND options, giving an option to disable some code that's currently always enabled. Removing this step probably saves a millisecond or so per page when writing data, which will add up quickly since these pages are small (the largest is 1 KiB). It doesn't seem to add a lot in terms of reliability, and wouldn't detect errors which crop up when transferring data to the on-chip SRAM buffer. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Acked-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/devices/Kconfig')
-rw-r--r--drivers/mtd/devices/Kconfig10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig
index 88f4df047464..6fde0a2e3567 100644
--- a/drivers/mtd/devices/Kconfig
+++ b/drivers/mtd/devices/Kconfig
@@ -59,6 +59,16 @@ config MTD_DATAFLASH
Sometimes DataFlash chips are packaged inside MMC-format
cards; at this writing, the MMC stack won't handle those.
+config MTD_DATAFLASH_WRITE_VERIFY
+ bool "Verify DataFlash page writes"
+ depends on MTD_DATAFLASH
+ help
+ This adds an extra check when data is written to the flash.
+ It may help if you are verifying chip setup (timings etc) on
+ your board. There is a rare possibility that even though the
+ device thinks the write was successful, a bit could have been
+ flipped accidentally due to device wear or something else.
+
config MTD_DATAFLASH_OTP
bool "DataFlash OTP support (Security Register)"
depends on MTD_DATAFLASH